en.Wedoany.com Reported - China Railway Group Limited (CREC), along with several of its subsidiaries, participated in the construction of Kunming's 15th Water Purification Plant, which commenced trial operation on June 15. The project was invested in by CREC's subsidiary, China Railway Kaiyuan Investment Group, and jointly constructed by China Tiegong Investment's China Railway Municipal Environmental Engineering Company, China Railway First Group, China Railway Eighth Group, and China Railway Shanghai Group, among others.
This fully underground water purification plant is located on Baofeng Peninsula in Guandu District. It ranks third in the country and is the largest in Southwest China in terms of designed treatment capacity, serving as a key project in the "14th Five-Year Plan" for water pollution prevention and control in the Dianchi Lake Basin. Covering an area of 19.68 hectares, the plant serves a catchment area of 380.16 square kilometers, with a long-term planned service population of approximately 3.2879 million. Its designed dry-season wastewater treatment capacity is 400,000 cubic meters per day, which can reach 600,000 cubic meters per day during the rainy season. Part of the treated effluent will flow into the New Baoxiang River, while the remainder will be transported as ecological replenishment water to the Baofeng Peninsula Wetland Park.
During construction, the project team integrated the ecological concept of "underground pollution treatment, above-ground landscape creation." They innovatively adopted a combined process of "modified SBR biological tank + denitrification deep-bed filter + dissolved air flotation tank + deep-bed sand filter + UV disinfection," complemented by a sludge deep dewatering system and a biological + soil composite deodorization system. This achieved full-process, closed-loop control of wastewater, sludge, and exhaust gases.
Once operational, Kunming's 15th Water Purification Plant will fundamentally alleviate issues such as insufficient wastewater treatment capacity and rainwater-sewage overflow in the main urban area of Kunming. It will become a new ecological landmark of the Spring City, characterized by "plant underground, landscape above ground, clear water and green banks, and harmony between people and water," contributing to the ecological protection of Dianchi Lake and the enhancement of urban quality.
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